Advertisements
Advertisements
Question
Give the results of Rutherford alpha scattering experiment.
Advertisements
Solution
- Most of the alpha particles are undeflected through the gold foil and went straight.
- Some of the alpha particles are deflected through a small angle.
- A few alpha particles (one in thousand) are deflected through an angle more than 90°.
- Very few alpha particles returned back (back scattered) -that is, deflected back by 180°.
APPEARS IN
RELATED QUESTIONS
Splitting of spectral lines in an electric field is called __________.
According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?
The ratio of the wavelengths for the transition from n =2 to n = 1 in Li++, He+ and H is ______.
The electric potential between a proton and an electron is given by V = V0 In `("r"/"r"_0)`, where r0 is a constant. Assume that Bohr atom model is applicable to potential, then a variation of radius of nth orbit rn with the principal quantum number n is
Write down the postulates of Bohr atom model.
Write down the draw backs of the Bohr atom model.
What is distance of closest approach?
Explain the J. J. Thomson experiment to determine the specific charge of an electron.
In the Bohr atom model, the frequency of transitions is given by the following expression
v = `"Rc" (1/"n"^2 - 1/"m"^2)`, where n < m
Consider the following transitions:
| Transitions | m → n |
| 1 | 3 → 2 |
| 2 | 2 → 1 |
| 3 | 3 → 1 |
Show that the frequency of these transitions obey sum rule (which is known as Ritz combination principle).
- A hydrogen atom is excited by radiation of wavelength 97.5 nm. Find the principal quantum number of the excited state.
- Show that the total number of lines in emission spectrum is `("n"("n - 1"))/2`.
Compute the total number of possible lines in emission spectrum as given in(a).
